Balancing, Identifying, and Predicting Reactions

__Al + __Fe₃N₂ -->__AlN + __Fe

• already balanced
• 4,2,4,6
• 2,1,2,3
• 1,2,1,3

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

__Na + __Cl₂ --> __NaCl

• 1,1,2
• 2,1,2
• 2,1,1
• already balanced

Tags

NGSS.HS-PS1-7

__H₂O₂ --> __H₂O + __O₂

• already balanced
• 2,1,1
• 2,2,1
• 2,1,2

Tags

NGSS.HS-PS1-7

__BF₃ + __Li₂SO₃ --> __B₂(SO₃)₃ + __LiF

• 2,3,1,3
• 2,3,1,6
• 4,4,2,12
• 3,3,1,9

Tags

NGSS.HS-PS1-7

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with
• must be an even number
• can be different to the number you finish with
• changes depending on how much energy is formed

Tags

NGSS.HS-PS1-7

Which type of reaction is:

2 NH₃ + H₂SO₄ → (NH₄)₂SO₄

• Synthesis
• Decomposition
• Single Displacement
• Double Displacement

What kind of reaction is this:
2H₂ + O₂ --> 2H₂O

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

Answer explanation

Two or more elements/ compounds combine to make a more complex substance.

Ex: A + B --> AB

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

• Synthesis
• Decomposition
• Single Displacement
• Combustion

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 
• decomposition 
• combustion 
• single replacement

Answer explanation

Reactants: A hydrocarbon and oxygen

Products: water and carbon dioxide

Which type of reaction is: C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O

• Synthesis
• Decomposition
• Single Displacement
• Combustion